Four students A, B, C and D were studying the effect of the solutions of hydrochloric acid, sodium hydroxide, sodium chloride and pure water respectively on blue litmus solution. Which of the students observed the colour change of blue litmus solution to red?
(1) A
(2) B
(3) C
(4) D

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Solution

As student A has the hydrochloric acid, so he would observe the colour change of blue litmus solution to the red"

Hence, the correct answer is option 1.

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Four students A, B, C and D were studying the effect of the solutions of hydrochloric acid, sodium hydroxide, sodium chloride and pure water respectively on blue litmus solution. Which of the students observed the colour change of blue litmus solution to red? (1) A (2) B (3) C (4) D

As student A has the hydrochloric acid, so he would observe the colour change of blue litmus solution to the red" Hence, the correct answer is option 1.

Four students A, B, C and D were studying the effect of the solutions of hydrochloric acid, sodium hydroxide, sodium chloride and pure water respectively on blue litmus solution. Which of the students observed the colour change of blue litmus solution to red?
(1) A
(2) B
(3) C
(4) D

As student A has the hydrochloric acid, so he would observe the colour change of blue litmus solution to the red"

Hence, the correct answer is option 1.